kirkheaton25
asked on
Cannot receive mail as access port 25 on Red Hat Linux VPS is blocked
I have a VPS which has never had email working properly. I asked the hosting company to look at the problem but the result was my server was down for a week so I told them to not to bother any more! UnfortunatelyI now need to have a working mailbox on this server so I am hoping the Experts here will more helpful.
I have tried adding rules to the firewall to allow port 25 using the virtuozzo control panel but I get the following:
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The changes you made to the firewall configuration have not yet been applied to the server. To do it, click Activate.
Could not activate firewall configuration:
safeact: /usr/local/psa/var/modules
iptables: Memory allocation problem
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I then tried stopping iptables using "service iptables stop" (only to test) but I still cannot access port 25. I have tried using telnet and get connection refused. If I try to send email using the webmail on the control panel I get
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There was an error sending your message: unable to connect to smtp server localhost:25
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I also tried netstat -an |grep :25 |grep tcp but this shows no results.
I've read about a umiptent problem but I have been unable to change the limit
egrep "failcnt|numiptent" /proc/user_beancounters
----
uid resource held maxheld barrier limit failcnt
numiptent 14 14 20 20 0
------
However as stopping iptables doesn't seem to do anything I don't know if this is relevant.
Please ask if you require any further details.
Thanks.
I have tried adding rules to the firewall to allow port 25 using the virtuozzo control panel but I get the following:
-------------
The changes you made to the firewall configuration have not yet been applied to the server. To do it, click Activate.
Could not activate firewall configuration:
safeact: /usr/local/psa/var/modules
iptables: Memory allocation problem
-----------
I then tried stopping iptables using "service iptables stop" (only to test) but I still cannot access port 25. I have tried using telnet and get connection refused. If I try to send email using the webmail on the control panel I get
--------------
There was an error sending your message: unable to connect to smtp server localhost:25
--------------
I also tried netstat -an |grep :25 |grep tcp but this shows no results.
I've read about a umiptent problem but I have been unable to change the limit
egrep "failcnt|numiptent" /proc/user_beancounters
----
uid resource held maxheld barrier limit failcnt
numiptent 14 14 20 20 0
------
However as stopping iptables doesn't seem to do anything I don't know if this is relevant.
Please ask if you require any further details.
Thanks.
Last Comment
ASKER
Thanks, to answer your questions.
- No it's not a mission critical system.
- Yes I have root access.
Tried the above and it didn't return any errors.
- No it's not a mission critical system.
- Yes I have root access.
Tried the above and it didn't return any errors.
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ASKER
Thanks for the offer, unfortunately I can't risk it :-)
If I don't get any joy I may well look at Gmail as an option, I didn't know you could point mx records to it.
If I don't get any joy I may well look at Gmail as an option, I didn't know you could point mx records to it.
I run virtual hosting servers, and the majority of my clients mx records are set to gmail.
Works great, saves me the hassle of dealing with the spam. And gives the clients more storage than I could ever afford. =)
As for your VPS host, i would highly recommend switching to linode.com. =) Great community, great VPS service =) Upgrade, deploy on the fly.
Works great, saves me the hassle of dealing with the spam. And gives the clients more storage than I could ever afford. =)
As for your VPS host, i would highly recommend switching to linode.com. =) Great community, great VPS service =) Upgrade, deploy on the fly.
Im assuming that you did check that the mail service your using is actually running.
tail -f /var/log/path to your mta logs
start the service / stop it (logs should update)
Sometimes services will "appear" to be running, but their really not.
tail -f /var/log/path to your mta logs
start the service / stop it (logs should update)
Sometimes services will "appear" to be running, but their really not.
ASKER
I tried stopping and starting the service. In the logs the last entry is qmail: Starting qmail: succeeded,
but when I enter service qmail status I get "qmail is stopped"?????
but when I enter service qmail status I get "qmail is stopped"?????
Your best bet at this point would be to hire a qmail freelancer or head over to:
http://forum.qmailrocks.org/
It will be really hard for someone to help you without access to logs or your system.
Personally I will stop monitoring this question past this point. As I feel that I cannot add further value.
http://forum.qmailrocks.org/
It will be really hard for someone to help you without access to logs or your system.
Personally I will stop monitoring this question past this point. As I feel that I cannot add further value.
ASKER
Many thanks for your help. I will also look at the hosting you recommended in the near future.
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Do you have root access to the server?
RHEL5 has additional security settings, mainly SE Linux.
Try this:
/sbin/modprobe ip_tables ipt_state ipt_multiport iptable_filter ipt_limit ipt_LOG ipt_REJECT ip_conntrack ip_conntrack_irc ip_conntrack_ftp iptable_mangle
Parse any errors you get here =)